删除文件 购物评论 情感分类/短信.ipynb
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吴沂钊
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{
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"cells": [
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "9d091a01",
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"metadata": {},
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"outputs": [],
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"source": [
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"import pandas as pd\n",
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"import numpy as np\n",
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"import re\n",
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"import jieba\n",
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"import pickle\n",
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"from wordcloud import WordCloud\n",
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"from sklearn.naive_bayes import GaussianNB\n",
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"from sklearn.model_selection import train_test_split\n",
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"from sklearn.feature_extraction.text import CountVectorizer, TfidfTransformer\n",
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"from sklearn.metrics import confusion_matrix\n",
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"import seaborn as sns\n",
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"import matplotlib.pyplot as plt\n",
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"plt.rcParams['font.sans-serif'] = 'SimHei'\n",
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"plt.rcParams['axes.unicode_minus'] = False\n",
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"import warnings\n",
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"warnings.filterwarnings('ignore')"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "eff92c98",
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"metadata": {},
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"outputs": [],
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"source": [
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"def data_process(file='message80W1.csv'):\n",
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"#读取数据并进行清洗\n",
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" data = pd.read_csv(file, header=None, index_col=0)\n",
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" data.columns = ['label', 'message']\n",
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" n = 5000\n",
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"\n",
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" a = data[data['label'] == 0].sample(n)\n",
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" b = data[data['label'] == 1].sample(n)\n",
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" data_new = pd.concat([a, b], axis=0)\n",
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"\n",
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" data_dup = data_new['message'].drop_duplicates()\n",
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" data_qumin = data_dup.apply(lambda x: re.sub('x', '', x))\n",
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"\n",
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" jieba.load_userdict('newdic1.txt')\n",
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" data_cut = data_qumin.apply(lambda x: jieba.lcut(x))\n",
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"\n",
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" stopWords = pd.read_csv('stopword.txt', encoding='GB18030', sep='hahaha', header=None)\n",
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" stopWords = ['≮', '≯', '≠', '≮', ' ', '会', '月', '日', '–'] + list(stopWords.iloc[:, 0])\n",
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" data_after_stop = data_cut.apply(lambda x: [i for i in x if i not in stopWords])\n",
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" labels = data_new.loc[data_after_stop.index, 'label']\n",
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" adata = data_after_stop.apply(lambda x: ' '.join(x))\n",
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" return adata, data_after_stop, labels"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "c3ae80f9",
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"metadata": {},
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"outputs": [],
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"source": [
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"def plot_confusion_matrix(cm, classes, normalize=False, title='Confusion matrix', cmap=plt.cm.Blues):\n",
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" sns.heatmap(cm, annot=True)\n",
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" plt.ylabel('True label')\n",
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" plt.xlabel('Predicted label')\n",
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" plt.title(title)\n",
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" plt.xticks(np.arange(len(classes)), classes)\n",
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" plt.yticks(np.arange(len(classes)), classes)\n",
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" plt.show()\n"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "56dbb0d1",
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"metadata": {},
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"outputs": [],
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"source": [
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"\n",
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"adata, data_after_stop, lables = data_process()\n",
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"data_tr, data_te, labels_tr, labels_te = train_test_split(adata, lables, test_size=0.2)\n",
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"countVectorizer = CountVectorizer()\n",
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"data_tr = countVectorizer.fit_transform(data_tr)\n",
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"X_tr = TfidfTransformer().fit_transform(data_tr.toarray()).toarray()\n",
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"data_te = CountVectorizer(vocabulary=countVectorizer.vocabulary_).fit_transform(data_te)\n",
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"X_te = TfidfTransformer().fit_transform(data_te.toarray()).toarray()\n",
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"model = GaussianNB()\n",
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"model.fit(X_tr, labels_tr)\n",
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"pred = model.predict(X_te)\n",
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"score = model.score(X_te, labels_te)\n",
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"with open('model.pkl', 'wb') as f:\n",
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" pickle.dump(model, f)\n",
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"with open('countVectorizer.pkl', 'wb') as f:\n",
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" pickle.dump(countVectorizer, f)\n",
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"plot_confusion_matrix(confusion_matrix(labels_te, pred), [1, 0], title=\"模型分类准确率{:.2f}%\".format(score * 100))"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "cc83543e",
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"metadata": {},
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"outputs": [],
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"source": [
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"\n",
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"word_fre = {}\n",
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"for i in data_after_stop[lables == 0]:\n",
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" for j in i:\n",
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" if j not in word_fre.keys():\n",
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" word_fre[j] = 1\n",
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" else:\n",
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" word_fre[j] += 1\n",
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"\n",
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"wc = WordCloud( background_color='white', font_path=r'C:/Windows/Fonts/SimHei.ttf')\n",
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"wc.fit_words(word_fre)\n",
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"plt.imshow(wc)\n",
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"plt.show()\n",
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"word_fre = {}\n",
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"for i in data_after_stop[lables == 0]:\n",
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" for j in i:\n",
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" if j not in word_fre.keys():\n",
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" word_fre[j] = 1\n",
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" else:\n",
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" word_fre[j] += 1\n",
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"\n",
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"wc = WordCloud( background_color='white', font_path=r'C:/Windows/Fonts/SimHei.ttf')\n",
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"wc.fit_words(word_fre)\n",
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"plt.imshow(wc)\n",
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"plt.show()"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "bde6f19c",
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"metadata": {},
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"outputs": [],
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"source": [
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"0"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "5f089b32",
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"metadata": {},
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"outputs": [],
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"source": []
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Python 3 (ipykernel)",
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"language": "python",
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"name": "python3"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.10.7"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 5
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}
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